Imagine that in the distant future you (on earth) are watching a transmission from Pluto, which at the time is 5.0 light-hours from earth. You notice that a clock on the wall behind the person speaking in the video reads 12:10 p.m. You note that your watch reads exactly the same time. Is the station clock synchronized with your watch?
A. Yes, it is.
B. No, it isn’t.
C. The problem doesn’t give enough information to tell.
B. No, it isn’t.
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At what frequency will a 12-?F capacitor have a reactance XC = 300 ??
A. 44 Hz B. 88 Hz C. 180 Hz D. 350 Hz E. 280 Hz
A mosquito flying at 3 m/s that encounters a breeze blowing at 3 m/s in the same direction has a speed of
A) 0 m/s. B) 3 m/s. C) 4 m/s. D) 6 m/s.
Which of these substances must be primordial?
A) helium B) lithium C) deuterium D) beryllium E) tritium
At an instant when a particle of mass 80 g has a velocity of 25 m/s in the positive y direction, a 75-g particle has a velocity of 20 m/s in the positive x direction. What is the speed of the center of mass of this two-particle system at this instant?
a. 16 m/s b. 45 m/s c. 23 m/s d. 20 m/s e. 36 m/s